CN103092452B - Capacitance touch screen and preparation method thereof and touch display unit - Google Patents
Capacitance touch screen and preparation method thereof and touch display unit Download PDFInfo
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- CN103092452B CN103092452B CN201310032951.2A CN201310032951A CN103092452B CN 103092452 B CN103092452 B CN 103092452B CN 201310032951 A CN201310032951 A CN 201310032951A CN 103092452 B CN103092452 B CN 103092452B
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Abstract
The invention discloses a kind of capacitance touch screen and preparation method thereof and touch display unit, relate to display field, the pattern interval of transparency conducting layer can be reduced, and then improve surperficial visual effect.Described capacitance touch screen, comprise the transparency conducting layer of transparency carrier and patterning, transparency conducting layer comprises the first sense line extended along first direction and the second sense line extended along second direction, wherein, first sense line keeps continuously at first direction, for a string electrode connected successively, the second sense line comprises multiple absolute electrode be separated from each other, and absolute electrode adopts bridging mode to stride across the first sense line is interconnected; Gap between the electrode of the absolute electrode in the first sense line and the second sense line, do not fill any material or fill specific inductive capacity and be more than or equal to 1, and be no more than the transparent insulation material of 3.5, with under the prerequisite not affecting touch sensitivity, reduce described gap width.
Description
Technical field
The present invention relates to display field, particularly relate to a kind of capacitance touch screen and preparation method thereof and touch display unit.
Background technology
Touch screen LCD development rapidly, develops into main flow flat-panel monitor gradually.Distinguish from know-why, touch screen LCD can be divided into: vector pressure sensing, resistance sensing, capacitance sensing, infrared ray sensing and surface acoustic wave sensing five kinds of fundamental types, divides developed into external hanging type (Addonmode), embedded (Oncellmode) and monoblock type (Incellmode) three types by structure.
A kind of common external hanging type capacitance touch screen as shown in Figure 1, transparency carrier 10 is disposed with from bottom to top: metal level 11, insulation course 12, transparency conducting layer 13 and transparent sealer 14, need 4 photoetching (4Mask) technique preparations, comprising: the first step, evaporation metal, etch through exposure, the metal forming X-direction in touch-screen viewing area puts up a bridge 111, forms metal routing 112 in pressing region 20; Second step, is coated with insulating layer coating 12 (Insulator) and also carries out exposure etching, to put up a bridge 111 two ends formation via holes at metal; 3rd step, evaporation ITO, and carry out exposing, etched features, the absolute electrode 132a mutually disconnected is formed in the X-direction of viewing area, form a string continuous electrode group mutually directly connected in the Y direction, form ITO layer in pressing region 20 simultaneously, avoid the metal routing 112 in pressing region 20 to be exposed to surface oxidized; 4th step, the sealer (PVX) 14 of coating insulation transparent, and reserve pressing region 20.Wherein, the continuous electrode group that Y-direction directly connects is the first sense line 131, and the absolute electrode 133 of X-direction is interconnected by metal bridging 111, strides across the first sense line 131, forms the second sense line 132.When a certain sense line is driven, namely another sense line obtains inductance capacitance, finger (or other objects) near or touch time, the electric capacity between the first sense line 131 and the second sense line 132 intersected near touch point can be affected, just can be identified the position of touch point by the capacitance variations detecting sense line.
Inventor finds the structural design of existing touch-screen, and at least there are the following problems:
Sealer 14 covers whole transparent electrode layer 13; therefore, the pattern interval of transparency conducting layer 13, the gap namely between the electrode of the first sense line 131 and the electrode of the second sense line 132; also upper surface protective seam 14 can be filled, because sealer 14 generally selects SiN
xor SiO
2, or resin material, specific inductive capacity is large, and consider the restriction of touch sensitivity to electric capacity, the making width of the pattern interval of existing transparency conducting layer is at least at about 0.03mm, and human eye just can see pattern interval clearly, affects surperficial visual effect simultaneously.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of capacitance touch screen and preparation method thereof and touch display unit, can reduce the pattern interval of transparency conducting layer, and then improves surperficial visual effect.
On the one hand, the invention provides a kind of capacitance touch screen, comprising: the transparency conducting layer of transparency carrier and patterning, described transparency conducting layer comprises the first sense line extended along first direction and the second sense line extended along second direction;
Wherein, described first sense line keeps continuously at described first direction, and be a string electrode connected successively, described second sense line comprises multiple absolute electrode be separated from each other, and described absolute electrode adopts bridging mode to stride across described first sense line is interconnected;
Gap between the absolute electrode of the absolute electrode in described first sense line and described second sense line, do not fill any material or be filled with specific inductive capacity and be more than or equal to 1, and be no more than the transparent insulation material of 3.5, with under the prerequisite not affecting touch sensitivity, reduce described gap width.
Further, described capacitance touch screen also comprises: have the transparent sealer of identical figure with described transparency conducting layer, cover on described transparency conducting layer.
Alternatively, described transparent insulation material is optical cement.
Further, described capacitance touch screen also comprises: the metal level of patterning, and described metal level is arranged on described transparency carrier, and is positioned at the below of described transparency conducting layer;
Described metal level comprises further: be positioned at the viewing area of described capacitance touch screen and put up a bridge along the spaced apart multiple metal of described second sense line, and be positioned at the metal routing in pressing region of described capacitance touch screen, described metal is put up a bridge and is arranged at the below that described absolute electrode is interconnected place, and described absolute electrode is interconnected to form described second sense line.
Further, described capacitance touch screen also comprises insulation course, and described insulation course is covered on described metal level, and is respectively arranged with via hole at the two ends that arbitrary described metal is put up a bridge;
Described transparency conducting layer is positioned on described metal level, and fills described via hole to downward-extension;
Described absolute electrode is put up a bridge by the transparent conductive material in described via hole and described metal and is interconnected, and forms described second sense line.
Described capacitance touch screen also comprises second transparency conducting layer with described metal level with identical figure, and described second transparency conducting layer is covered on the bridging of described metal and described metal routing;
Described absolute electrode is put up a bridge by the metal being coated with described second transparency conducting layer and is interconnected, and forms described second sense line.
Alternatively, the electrode of described first sense line assumes diamond in shape, and the absolute electrode of described second sense line also assumes diamond in shape.
The present invention also provides a kind of touch display unit, is provided with described arbitrary capacitance touch screen.
On the other hand, the present invention also provides a kind of method for making of capacitance touch screen, comprising:
Make described metal level and described second transparency conducting layer on the transparent substrate, patterning processes is adopted to form some groups of bridgings in the viewing area of described capacitance touch screen, metal routing is formed in the pressing region of described capacitance touch screen, also form the transparent conductive pattern of identical patterns simultaneously, be covered on described bridging and described metal routing, wherein, each is organized described bridging and comprises and multiplely to put up a bridge along the spaced apart metal of second direction;
Make insulation course, the two ends adopting patterning processes to put up a bridge at arbitrary described metal arrange via hole respectively, and described second transparency conducting layer covered in the bridging of described metal is exposed at described via hole place;
Make described transparency conducting layer and transparent sealer, described transparency conducting layer fills described via hole at the via hole place of described insulation course to downward-extension, and the metal that described transparency conducting layer is connected to below by the transparent conductive material in described via hole is put up a bridge;
Patterning processes is adopted to form identical patterned layer on described transparency conducting layer and described sealer, comprise: the first sense line extended along first direction and the second sense line extended along second direction, wherein, described first sense line is a string electrode connected successively, keep continuously at described first direction, described in each, the second sense line correspondence is positioned at the top that metal described in a group is put up a bridge, described in each, the second sense line comprises multiple absolute electrode, be separately positioned on the top in any two adjacent metal bridging gaps in corresponding metal bridging group, described absolute electrode strides across described first sense line by the described metal bridging of below and is interconnected, form described second sense line.
Capacitance touch screen of the present invention and touch display unit, first sense line and the second sense line are positioned at same transparency conducting layer, the realization of its touch function depends on the electric capacity between the first sense line and the second sense line, and the gap width positive correlation in the size of this electric capacity and the first sense line between absolute electrode and the electrode of the second sense line, and the DIELECTRIC CONSTANT ε of megohmite insulant between gap
rnegative sense closes, and does not therefore fill any material in the gap (pattern interval of transparency conducting layer) of the first sense line and the second sense line or fills DIELECTRIC CONSTANT ε
rlittle transparent insulation material (1≤ε
r≤ 3.5), under the prerequisite not affecting touch sensitivity (electric capacity), the pattern interval of transparency conducting layer can be reduced, thus improves surperficial visual effect.
The manufacture method of described capacitance touch screen provided by the invention, transparency conducting layer is identical with surface protection layer pattern, can synchronously complete, save a Mask processing step, therefore adopt 3Mask technique to complete, relatively existing 4Mask technique, processing step reduces, thus enhance productivity, reduce production cost and take, and product reliability improves; Meanwhile, also can reduce the pattern interval of transparency conducting layer, and then improve visual effect.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of existing capacitance touch screen;
The structural representation one of the capacitance touch screen that Fig. 2 embodiment of the present invention one provides;
Fig. 3 is the structural representation of the transparency conducting layer of the embodiment of the present invention one capacitance touch screen;
Fig. 4 is the operating diagram of capacitance touch screen;
The structural representation two of the capacitance touch screen that Fig. 5 provides for the embodiment of the present invention one;
The method for making process flow diagram of the capacitance touch screen that Fig. 6 embodiment of the present invention two provides;
The pattern of metal level in Fig. 7 embodiment of the present invention two;
Insulating layer pattern in Fig. 8 embodiment of the present invention two.
Description of reference numerals
10-transparency carrier, 11-metal level, 12-insulation course, 13-transparency conducting layer,
14-sealer, 15-second transparency conducting layer, 20-pressing region, 21-flexible PCB,
111-metal is put up a bridge, 112-metal routing, 121-via hole, 131-first sense line,
132-second sense line, 132a-absolute electrode.
Embodiment
The embodiment of the present invention provides a kind of capacitance touch screen and preparation method thereof and touch display unit, can reduce the pattern interval of transparency conducting layer, and then improves surperficial visual effect.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.Embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Embodiment one
The embodiment of the present invention provides a kind of capacitance touch screen, as shown in Figures 2 and 3, comprise: the transparency conducting layer 13 of transparency carrier 10 and patterning, described transparency conducting layer 13 arranges on the transparent substrate 10, comprise: the first sense line 131 extended along first direction (as illustrated in the drawing longitudinal direction) and the second sense line 132 extended along second direction (transverse direction as perpendicular with longitudinal direction)
Wherein, the first sense line 131 keeps continuously at first direction, and be a string electrode connected successively, the second sense line 132 comprises multiple absolute electrode 132a be separated from each other, and absolute electrode 132a adopts bridging mode to stride across the first sense line 131 is interconnected;
Gap d between the electrode of the absolute electrode 132a in the first sense line 131 and the second sense line 132, do not fill any material or fill specific inductive capacity and be more than or equal to 1, and be no more than the transparent insulation material of 3.5, with under the prerequisite not affecting touch sensitivity, reduce described gap width d.
In the present embodiment, the number of the first sense line 131 and the second sense line 132 is not all limited, the first sense line 131 and the second sense line 132 crisscross, in staggered place, the second sense line 132 adopts bridging mode to stride across the first sense line 131.
Alternatively, the electrode of the present embodiment first sense line 131 and the absolute electrode 132a of the second sense line 132 all can be rhombus or triangle, but also do not get rid of other shape.Preferably, the first sense line 131 shown in Fig. 3 is the pattern that multiple rhombus connects and composes successively, and the second sense line 132 is the pattern that the rhombus of multiple mutual disconnection is formed.
As shown in Figure 4, capacitance touch screen, the realization of its touch function depends on the electric capacity between the electrode of the first sense line 131 and the absolute electrode 132a of the second sense line 132, this electric capacity can be equivalent to two parts electric capacity: a part is the electric capacity Cp1 (with the electric field line that the straight line of arrow represents in corresponding diagram) resulted between the electrode of the first sense line 131 and absolute electrode 132a right opposite, and this part electric capacity is major part; Another part is the electric capacity Cp2 (electric field line in corresponding diagram shown in curve) resulting from the electrode of the first sense line 131 and the absolute electrode 132a outer space of the second sense line 132.If point the electric capacity knots modification that causes when setting touch as Cp0 (electric field line that corresponding diagram cathetus represents), then finger dexterity can be expressed as roughly: touch sensitivity Q=Cp0/ (Cp1+Cp2).This ratio is larger, then the larger Q of touch sensitivity.In existing capacitive touch screen structure design, the material that the electrode gap (pattern interval of transparency conducting layer) of the first sense line and the second sense line is filled is SiN
x, its specific inductive capacity is 6.5 (or is SiO
2, its relative dielectric constant is 3.9; Or be resin material, relative dielectric constant is generally 3.2 ~ 3.5), pattern interval width d is generally 30 ~ 50 microns, if reduce pattern interval width d further, then Cp1 increases, and causes touch sensitivity Q to reduce, and finger goes touch-control that touch-control may be caused malfunctioning again.
For this problem, in the embodiment of the present invention, the electrode gap (pattern interval of transparency conducting layer) of the first sense line and the second sense line is not filled any material or fills DIELECTRIC CONSTANT ε
rlittle transparent insulation material (1≤ε
r≤ 3.5).Under the prerequisite not changing touch sensitivity (electric capacity Cp1 and Cp2 is substantially constant), the electrode gap (pattern interval of transparency conducting layer) of the first sense line 131 and the second sense line 132 can be reduced to 1/6.5 original ~ 3.5/6.5, namely about 4.6 ~ 16.2 microns, the object improving visual effect is reached.Suppose in the design of original capacitive touch screen structure at this, the SiN for sealer filled between gap
x(or SiO
2).
Such as, when not filling any material, when can think that the material of filling is air, the specific inductive capacity of air is 1, therefore electric capacity Cp1 and Cp2 sum are about about 1/6.5 of conventional value, under the prerequisite not changing touch sensitivity (electric capacity Cp1 and Cp2 is substantially constant), the electrode gap (pattern interval of transparency conducting layer) of the first sense line 131 and the second sense line 132 can be reduced at most original 1/6.5, namely about 4.6 microns, and 4 ~ 5 microns of Limiting Levels substantially also reaching existing technique, such human eye just can not identification icon gap, thus the visual impact brought by pattern interval drops to minimum.
Notably, if the capacitance touch screen of GlassToGlass structure, in concrete enforcement, coating optical cement OCA is needed when post-production, to adhere to cover plate (top layer glass), therefore the pattern interval of transparency conducting layer may fill optical cement OCA, or is partial optical glue OCA and partial air (optical cement OCA does not fill completely).The specific inductive capacity of optical cement OCA is 1.5, consider that optical cement OCA may not fill completely, therefore can think that the specific inductive capacity of now pattern interval transparent insulation material is between 1 ~ 1.5, the pattern interval of transparency conducting layer can be reduced to original about 1.25/6.5 (between the gap supposing original capacitive touch screen, filling material is SiNx).
Further, as shown in Figure 5, described capacitance touch screen also comprises: have the transparent sealer 14 of identical figure with transparency conducting layer 13, cover on transparency conducting layer 13.Transparent sealer 14 has identical figure with transparency conducting layer 13, by synchronously completing with an operation when using patterning processes to make.In concrete enforcement, after producing transparency conducting layer 13 and sealer 14, adopt a photoetching process to complete, in photoetching process, only need use a mask plate.
Capacitance touch screen described in the present embodiment can save a patterning processes step when making, and therefore can enhance productivity, and reduces production cost and takes, and simultaneously because processing step reduces, product reliability is also improved.
Wherein, described capacitance touch screen also comprises: the metal level 11 of patterning, and metal level 11 is arranged on the transparent substrate 10, and is positioned at the below of transparency conducting layer 13; Metal level 11 comprises further: what be positioned at the viewing area of capacitance touch screen puts up a bridge 111 and be positioned at the metal routing 112 in pressing region 20 of capacitance touch screen along the spaced apart multiple metal of the second sense line, metal bridging 111 is arranged at the below that absolute electrode 132a is interconnected place, absolute electrode 132a is interconnected to form the second sense line 132.
Further, described capacitance touch screen also comprises: insulation course 12, is covered on metal level 11, and is respectively arranged with via hole 121 at the two ends of arbitrary metal bridging 111; Transparency conducting layer 13 is positioned on metal level 11, and to downward-extension filled vias 121, absolute electrode 132a is interconnected by the transparent conductive material in via hole 121 and metal bridging 111, forms the second sense line 132.
Described capacitance touch screen also comprises: have the second transparency conducting layer 15 of identical figure with metal level 11, is covered on metal bridging 111 and metal routing 112; Absolute electrode 132a is interconnected by the metal bridging 111 being coated with the second transparency conducting layer 15, forms the second sense line 132.
Herein; the reason of metal level 11 surface preparation the second transparency conducting layer 15 is: because sealer 14 and transparency conducting layer 13 have identical patterns; therefore for ease of being connected with outside by flexible PCB 21; transparency conducting layer 13 in pressing region 20 without figure; may be oxidized for avoiding the pressing region of metal level and other regions to be exposed to surface; thus change its Resistance Influence touch function; need preparation on metal level 11 to have the second transparency conducting layer 15 of identical figure, be covered on metal bridging 111 and metal routing 112.
Sealer 14 in the present embodiment and transparency conducting layer 13 have identical pattern, by synchronously completing with an operation when using patterning processes to make, do not need additionally to increase operation.
The structural design of existing capacitance touch screen, 4Mask technique need be adopted during production, and capacitance touch screen of the present invention only need adopt 3Mask technique to complete, therefore when prepared by capacitive touch screen of the present invention, processing step is few, production efficiency is high, production cost is minimized, and product reliability improves; Meanwhile, also under the prerequisite not affecting touch sensitivity (electric capacity), the pattern interval of transparency conducting layer can be reduced, and then improves visual effect.
The embodiment of the present invention additionally provides a kind of touch display unit, and it is provided with described arbitrary touch-screen, and cost is lower, and display effect is better.Described touch display unit can be: liquid crystal panel, Electronic Paper, oled panel, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument etc. are any needs the product or the parts that touch Presentation Function.
Embodiment two
The present invention also provides a kind of method for making of capacitance touch screen; with reference to figure 2 ~ 5; described touch-screen comprises: transparency carrier 10; set gradually sealer 14 transparent on the transparent substrate 10, transparency conducting layer 13, insulation course 12, second transparency conducting layer 15 and metal level 11 from top to bottom; as shown in Figure 6, the method comprises:
Step 101, as shown in Figure 7, make metal level 11 and the second transparency conducting layer 15 on the transparent substrate 10, patterning processes is adopted to form some groups of bridgings in the viewing area of capacitance touch screen, each group bridging comprises multiple along the spaced apart metal bridging 111 of second direction, metal routing 112 is formed in the pressing region 20 of capacitance touch screen, also form the transparent conductive pattern of identical patterns simultaneously, be covered on metal bridging 111 and metal routing 112;
In this step, transparency carrier 10 makes metal level 11 and the second transparency conducting layer (ITO layer) 15, then etch simultaneously, second direction (transverse direction in figure) forms metal and puts up a bridge and ITO bridging, so that the first sense line is along first direction, second sense line along second direction conducting separately, and forms metal routing figure and the second transparency conducting layer 15 in pressing region 20 (Bonding).
Step 102, making insulation course 12, adopt patterning processes to arrange via hole 121 respectively at the two ends of arbitrary metal bridging 111, the second transparency conducting layer 15 covered in metal bridging 111 exposed at via hole place 121, as shown in Figure 8;
Apply in this step and make layer pattern (Insulator), and adopt patterning processes that via hole 121 is set respectively at the two ends of arbitrary metal bridging 111, make the metal of lower floor put up a bridge 111 and second transparency conducting layer 15 expose, be convenient to transparency conducting layer 13 prepared by the next step conducting in second direction.Reserve pressing region 20 in this step, namely there is not insulation course 12 in pressing region 20.
Step 103, making transparency conducting layer 13 and transparent sealer 14, transparency conducting layer 13 is at the via hole place of insulation course 12 to downward-extension filled vias 121, and the metal that transparency conducting layer 13 is connected to below by the transparent conductive material in via hole 121 puts up a bridge 111,
Patterning processes is adopted to form identical patterned layer on transparency conducting layer 13 and sealer 14, as shown in Fig. 5 and Fig. 3, comprise: the first sense line 131 extended along first direction and the second sense line 132 extended along second direction, wherein, first sense line 131 is a string electrode connected successively, keep continuously at first direction, each second sense line 132 correspondence is positioned at the top that one group of metal is put up a bridge, each second sense line 132 comprises multiple absolute electrode 132a, be separately positioned on any two adjacent metals in corresponding metal bridging group to put up a bridge the top of 111 gap locations, absolute electrode 132a strides across the first sense line 131 by the metal bridging 111 of below and is interconnected, form the second sense line 132.
In this step, make transparency conducting layer 13 and sealer 14, then etch simultaneously, form continuous print first sense line 131 at first direction; Put up a bridge corresponding to each group of metal made in step 101, many group absolute electrode 132a are formed in second direction, each absolute electrode 132a is arranged on any two adjacent metal in corresponding metal bridging group and puts up a bridge the top in 111 gaps, make absolute electrode 132a by insulation course 12 via hole at two ends, with the metal of lower floor put up a bridge 111 and second transparency conducting layer 15 be connected, thus absolute electrode 132a is interconnected along first direction, form the second sense line 132.
In addition, need in this step to reserve pressing region 20, namely there is not transparency conducting layer 13 and sealer 14 in pressing region 20 yet.
The manufacture method of described capacitance touch screen provided by the invention, adopt 3Mask technique to complete, relatively existing 4Mask technique, processing step reduces, thus improves production efficiency, reduce production cost and take, and product reliability improves; Meanwhile, also can reduce the pattern interval of transparency conducting layer, and then improve visual effect.
For the capacitance touch screen of GlassToGlass structure; on sealer 14, also need coating optical cement OCA to adhere to cover plate (top layer glass); therefore the pattern interval of transparency conducting layer also may fill optical cement OCA, or is partial optical glue OCA and partial air (optical cement OCA does not fill completely).The specific inductive capacity of optical cement OCA is 1.5, can think that the specific inductive capacity of now pattern interval megohmite insulant transparent insulation material is between 1 ~ 1.5, the pattern interval of transparency conducting layer can be original about 1.25/6.5, and (between the gap supposing original capacitive touch screen, filling material is SiN
x).
Should be noted: though the present invention is for external hanging type capacitance touch screen, the known application of the present invention of those skilled in the art is not limited to this, also can be used for embedded (OnCell) touch display unit.
In addition, application of the present invention is also not limited to GlassToGlass structure, also can be applied to the structures such as OGS, wherein said GlassToGlass structure, refers to that touch sensing is made on ito glass, and skin adds a slice cover glass (cover plate); Described OGS (Oneglasssolution) structure, refer to directly form ITO conducting film and sensor on cover glass, one block of glass plays the double action of cover glass and touch sensor simultaneously.
Technical characteristic described in the embodiment of the present invention, when not conflicting, can combinationally use arbitrarily mutually.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (8)
1. a capacitance touch screen, is characterized in that, comprising: the transparency conducting layer of transparency carrier and patterning, and described transparency conducting layer comprises the first sense line extended along first direction and the second sense line extended along second direction;
Wherein, described first sense line keeps continuously at described first direction, and be a string electrode connected successively, described second sense line comprises multiple absolute electrode be separated from each other, and described absolute electrode adopts bridging mode to stride across described first sense line is interconnected;
Gap between the absolute electrode of the electrode in described first sense line and described second sense line, does not fill any material or filling specific inductive capacity is more than or equal to 1 and is no more than the transparent insulation material of 3.5;
Described capacitance touch screen also comprises the metal level of patterning, and described metal level to be arranged on described transparency carrier and to be positioned at the below of described transparency conducting layer; Described metal level comprises further: be positioned at the viewing area of described capacitance touch screen and put up a bridge along the spaced apart multiple metal of described second sense line, and is positioned at the metal routing in pressing region of described capacitance touch screen;
Described capacitance touch screen also comprises second transparency conducting layer with described metal level with identical figure, and described second transparency conducting layer is covered on the bridging of described metal and described metal routing; Described absolute electrode is put up a bridge by the metal being coated with described second transparency conducting layer and is interconnected, and forms described second sense line.
2. capacitance touch screen according to claim 1, is characterized in that, described capacitance touch screen also comprises: have the transparent sealer of identical figure with described transparency conducting layer, cover on described transparency conducting layer.
3. capacitance touch screen according to claim 1 and 2, is characterized in that,
Described transparent insulation material is optical cement.
4. the capacitance touch screen according to any one of claim 1 or 2, is characterized in that, described metal is put up a bridge and is arranged at the below that described absolute electrode is interconnected place, and described absolute electrode is interconnected to form described second sense line.
5. capacitance touch screen according to claim 4, is characterized in that, described capacitance touch screen also comprises insulation course, and described insulation course is covered on described metal level, and is respectively arranged with via hole at the two ends that arbitrary described metal is put up a bridge;
Described transparency conducting layer is positioned on described metal level, and fills described via hole to downward-extension;
Described absolute electrode is put up a bridge by the transparent conductive material in described via hole and described metal and is interconnected, and forms described second sense line.
6. the capacitance touch screen according to any one of claim 1 or 2, it is characterized in that, the electrode of described first sense line assumes diamond in shape, the absolute electrode of described second sense line also assumes diamond in shape.
7. a touch display unit, is characterized in that, is provided with the capacitance touch screen described in any one of claim 1-6.
8. a method for making for capacitance touch screen, is characterized in that, comprising:
Make metal level and the second transparency conducting layer on the transparent substrate, patterning processes is adopted to form some groups of bridgings in the viewing area of described capacitance touch screen, metal routing is formed in the pressing region of described capacitance touch screen, also form the transparent conductive pattern of identical patterns simultaneously, be covered on described bridging and described metal routing, wherein, each is organized described bridging and comprises and multiplely to put up a bridge along the spaced apart metal of second direction;
Make insulation course, the two ends adopting patterning processes to put up a bridge at arbitrary described metal arrange via hole respectively, and described second transparency conducting layer covered in the bridging of described metal is exposed at described via hole place;
Make transparency conducting layer and transparent sealer, described transparency conducting layer fills described via hole at the via hole place of described insulation course to downward-extension, and the metal that described transparency conducting layer is connected to below by the transparent conductive material in described via hole is put up a bridge;
Patterning processes is adopted to form identical patterned layer on described transparency conducting layer and described sealer, comprise: the first sense line extended along first direction and the second sense line extended along second direction, wherein, described first sense line is a string electrode connected successively, keep continuously at described first direction, described in each, the second sense line correspondence is positioned at the top that metal described in a group is put up a bridge, described in each, the second sense line comprises multiple absolute electrode, be separately positioned on the top in any two adjacent metal bridging gaps in corresponding metal bridging group, described absolute electrode strides across described first sense line by the described metal bridging of below and is interconnected, form described second sense line,
Wherein, the gap between the absolute electrode of the electrode in described first sense line and described second sense line, does not fill any material or filling specific inductive capacity is more than or equal to 1 and is no more than the transparent insulation material of 3.5.
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